Gear-cutter.



PATENTED Nov; 20, 1906.

3 SHEETS SHEET 1.

Wyn 70H JOHN Voss W/TNESSES:

rut NORRIS PZTERS 50., WASHINGTON. a. c.

PATENTED NOV. 20, 1906.

I. VOSS.

GEAR CUTTER. APPLIGATIOIT FILED 1-23.21, 1906.

3 SHEETS-SHEET 2.

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No. 836,545. PATBNTED NOV. 20, 1906. J. voss.

GEAR CUTTER.

APPLICATION FILED FBB.21, 1906.

3 SHEETS-SHEET 3v INVENTOH J OHN Voss WITNESSES.

ATTORNEYS JOHN VOSS. OF WOODBURN, OREGON.

GEAR-CUTTER.

Specification of Letters Patent.

Patented Nov. 20, 1906.

Application filed February 21, 1906. Serial No. 302,203.

To all whom it may concern:

Be it known that I, JOHN Voss, a citizen of the United States, and a resident of I/Voodburn, in the county of Marion and State of Oregon, have made certain new and useful Improvements in Gear-Cutters, of which the following is a specification.

My invention is an improvement in gearcutters; and it consists in certain novel constructions and combinations of parts hereinafter described and claimed.

In the drawings, Figure 1 is a perspective view of my improvement. Fig. 2 is a side view of the gear-cutter and its carrying mechanism, the gear-cutter and yoke being shown partly in section. Fig. 3 is a plan view of the disk. Fig. 4 is a detail perspective view of the spring-plate. Fig. 5 is a sectional detail of a part of the springplate and a part of the disk. Fig. 6 is a longitudinal section of the gear-wheel-carrying pin. Fig. 7 is a section on the line 7 7 of Fig. 2. Fig. 8 is a transverse vertical section of the mechanism for supporting the gear-carrying yoke, and Fig. 9 is a lan view of one of the sliding plates for arfiusting the gear-carrying yoke.

In the practical ap lication of my invention I provide a bed ll supported by a suitable foot a, the bed having in the upper face thereof an undercut groove a, in which is fixed a head B at one end of the bed. A shaft b is journaled in the head B and is provided on its inner end with a chuck b and near its other end with a conical pulley 5 Upon the outer end of the shaft 1) is secured a wheel or disk C, having a plurality of annular series of perforations c, the perforations of the series being spaced. apart from each other and the series being spaced radially from each other upon the disk. The perforations of the different series are unequally spaced and are adapted to be engaged by a pin 0 secured to a spring-plate c, the said plate being attached to the end of the bed by a screw 0 and having its free end. bent backward upon itself, as at 0 the pin 0 traversing the bent portion and the body of the plate.

A gear-cutter carrier D, comprising a yoke composed of a body portion d and arms (V, is provided for supporting the gear-cutter, the arms of the yoke being split, as at (1 and provided with screw-threaded bearings d for receiving upper and lower screws d 01 having their inner ends cupped, as at d for a purpose to be hereinafter described. The

split ends of the arms are traversed by setscrews d for fixing the upper and lower screws in their adjusted positions, and the upper screw (i is provided with a milled. head on its outer end for convenience in manipulating the same and with a belt-wheel (1 having a downwardly-projecting pin (1 upon the inner side of the arm.

' The gear-cutter shaft E is provided with pointed ends 6 for engaging the depressions in the inner ends of the upper and lower screws, and the lower half of the shaft is reduced, as at e, the upper end being provided with a shoulder c at the junction of the said upper end with the reduced portion.

The cutter-wheel c is sup orted upon one side by the shoulders e and upon the other side by a washer 6 the washer being retained in place by an elongated nut c having a squared end c for manipulating the nut, and the shaft has fixed upon the upper end thereof a wheel 6 having a notch c for engagement by the pin 61 of the belt-wheel d. The body portion (1 of the yoke traverses the slot g in a cylindrical support g, secured to a plate G, the said body portion being fixed within the slot by means of a capstan-screw g traversing the support and engaging the body portion.

The plate G is provided on its lower face with an undercut groove 9 in which is received a tongue 9 upon a second plate 9, the said plate 9 being provided with a longitudinal slot and being rigidly connected with another plate 9 Within the slot of the plate 9 is a screw-threaded rod 9 having a andle g and engaging a screw-threaded opening in a lug upon the lower face of the slid ng plate G, whereby to traverse the plate G upon the plate 9. The plate 9 is provided in its lower face with an undercut groove 9 in which is received a tongue g upon a fourth plate 9 the plate 9 being traversed upon the plate 9 by a rod g arranged in a similar manner to the above-described rod and provided with a handle 9 for convenience in manipulating the rod. The plate 9 is fixed to a bar g having on its under face an undercut groove g and the bar is adjustably held to the bed by means of a pin 9 having a head 9 received into the groove 9 and traversing a slot 9 in the bed, the outer end of the pin-being screw-threaded and engaged by a nutg.

The gear-wheel O is supported by a pin H, having a rounded end it for engaging the chuck and a reduced portion 71,, provided with a shoulder 7L2. A washer it rests against the shoulder for supporting the gear-wheel upon one side, and a second washer h supports the gear-wheel upon the other side, the parts being secured in place by a nut 7L5 and locked by a lock-nut h.

Any suitable means may be provided for rotating the gear-cutter, said means being connected by a belt m with a pulley m upon a counter-shaft M, journaled in the arms m of a yoke m the yoke being supported by a standard m having in its upper end a split bearing for engaging the yoke, the yoke being retained in its adjusted position by a setscrew m The motion of the counter-shaft is transmitted to the gear-cutter by means of a belt m, engaging the pulley on the gearcutter shaft and a pulley m upon the counter-shaft. Between the counter-shaft and the gear-cutter is arranged a bracket K, comprising a base 76, having spaced cars 76, in which is received a lug k upon an arm k a pin traversing alined openings in the ears and lu s for connecting the parts together. Upon t e upper end of the arm is a sleeve 7c, retained in its adjusted position by a setscrew 767 and having pivoted thereto a plate 16 by means of a set-screw 76". Upon the plate are journaled pulleys 7c for engaging the upper and lower runs of the belt m It will be evident from the description of the bracket that the arm is free to swing with the motion of the gear-cutter upon the bed.

In operation the gear-wheel is secured in place upon the pin and the pin is inserted in the chuck. The pin 0 of the plate-spring c is inserted in a perforation of the series corresponding in spacing to the distance desired between the teeth of the gear-wheel. The gear-cutter being put in rotation, it is moved longitudinally on the bed until it engages the gear-wheel. Upon the retraction of the gearcutter the pin is disengaged from its perforation and inserted in the next of the series, after which the operation is repeated.

It will be evident from the description that my improvement may be used in connection with the ordinary lathe, one of the heads being replaced by the gear-cutting mechanism and the disk being secured to the shaft journaled in the other head.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In apparatus of the class described, a

cutter-support comprising a yoke having its' arms spaced apart and provided with screwthreaded bearings, bolts having depressions in their inner ends threaded through the bearings, a shaft having pointed ends for en gaging the depressions, said shaft having a reduced portion provided with a shoulder at the base thereof, said reduced portion being screw-threaded, a cutter on the reduced portion and resting against the shoulder, a nut threaded on the reduced portion and engaging the cutter, a disk secured to said shaft and provided with an opening and a pulley journaled on the end of one of said bolts and graying a pin to engage the opening of the 2. In apparatus of the class described, the combination with the bed, of a work-supporting shaft, a work-holding chuck in connection with the shaft, said chuck comprising a pin having a reduced screw-threaded stem provided with a shoulder at the base thereof for receiving the wheel to be operated upon, a conical nut threaded on the stem for engaging the opening of the wheel, a washer resting against the wheel, and a nut on the stem for securing the parts in place.

JOHN VOSS.

Witnesses Louis PREVOST, MAX SALZMAN. 

